But what sense of entailment do we want? Logical entailment seems too much to require. Consider the following paradigm cases of causation: a lightning strike at time t causes a fire at time t’a rock thrown at a window at t causes the window to break at t’ In neither case is there a logical entailment between the cause and the effect. If there is a relationship between lightning strikes and fires, or rock-throwings and window-breakings, it is not a logical relationship, but a relation of some other kind.